please help outdoor light problem !!

[my old man]

hi ,
i just wondering if anyone can me ? , i have two outside lights , both wired from the same single feed , one light has a sensor on it which triggers the other light on , both have the lights have been working fine for the last 7mths but all of a sudden the lights keep coming on and off constently , i have even tried to cover the sensor eye but they still keep coming on and off , this only happens at night time , please help because the next door neighbour keeps moaning

[ericmark]

Some sensors have multi functions which are controlled by switching supply off and on so many times is quickly. A power cut may activate this and change mode. I no longer have paper work so can't tell you how many times does what maybe you can find instructions for your device?